[3443] | 1 | MODULE sedco3 |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE sedco3 *** |
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| 4 | !! Sediment : carbonate in sediment pore water |
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| 5 | !!===================================================================== |
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| 6 | !! * Modules used |
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| 7 | USE sed ! sediment global variable |
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[10222] | 8 | USE sedchem |
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| 9 | USE lib_mpp ! distribued memory computing library |
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[3443] | 10 | |
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| 11 | |
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| 12 | IMPLICIT NONE |
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| 13 | PRIVATE |
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| 14 | |
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| 15 | !! * Routine accessibility |
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| 16 | PUBLIC sed_co3 |
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| 17 | |
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| 18 | !!---------------------------------------------------------------------- |
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[10222] | 19 | !! OPA 9.0 ! LODYC-IPSL (2003) |
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[3443] | 20 | !!---------------------------------------------------------------------- |
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| 21 | |
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[5215] | 22 | !! $Id$ |
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[3443] | 23 | CONTAINS |
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| 24 | |
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| 25 | |
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| 26 | SUBROUTINE sed_co3( kt ) |
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| 27 | !!---------------------------------------------------------------------- |
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| 28 | !! *** ROUTINE sed_co3 *** |
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| 29 | !! |
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| 30 | !! ** Purpose : carbonate ion and proton concentration |
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| 31 | !! in sediment pore water |
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| 32 | !! |
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| 33 | !! ** Methode : - solving nonlinear equation for [H+] with given alkalinity |
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| 34 | !! and total co2 |
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| 35 | !! - one dimensional newton-raphson algorithm for [H+]) |
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| 36 | !! |
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| 37 | !! History : |
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| 38 | !! ! 98-08 (E. Maier-Reimer, Christoph Heinze ) Original code |
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| 39 | !! ! 04-10 (N. Emprin, M. Gehlen ) coupled with PISCES |
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| 40 | !! ! 06-04 (C. Ethe) Re-organization |
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| 41 | !!---------------------------------------------------------------------- |
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| 42 | !! * Arguments |
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| 43 | INTEGER, INTENT(in) :: kt ! time step |
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| 44 | ! |
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| 45 | !---Local variables |
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[10222] | 46 | INTEGER :: ji, jk ! dummy loop indices |
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[3443] | 47 | |
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[10222] | 48 | REAL(wp), DIMENSION(jpoce,jpksed) :: zhinit, zhi |
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[3443] | 49 | !!---------------------------------------------------------------------- |
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| 50 | |
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[10222] | 51 | IF( ln_timing ) CALL timing_start('sed_co3') |
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| 52 | |
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[3443] | 53 | IF( kt == nitsed000 ) THEN |
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[10222] | 54 | IF (lwp) WRITE(numsed,*) ' sed_co3 : carbonate ion and proton concentration calculation ' |
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| 55 | IF (lwp) WRITE(numsed,*) ' ' |
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[3443] | 56 | ENDIF |
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| 57 | |
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| 58 | DO jk = 1, jpksed |
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[10222] | 59 | zhinit(:,jk) = hipor(:,jk) / densSW(:) |
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| 60 | END DO |
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[3443] | 61 | |
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[10222] | 62 | ! ------------------------------------------- |
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| 63 | ! COMPUTE [CO3--] and [H+] CONCENTRATIONS |
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| 64 | ! ------------------------------------------- |
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[3443] | 65 | |
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[10222] | 66 | CALL solve_at_general_sed(zhinit, zhi) |
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[3443] | 67 | |
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[10222] | 68 | DO jk = 1, jpksed |
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| 69 | DO ji = 1, jpoce |
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| 70 | co3por(ji,jk) = pwcp(ji,jk,jwdic) * ak1s(ji) * ak2s(ji) / (zhi(ji,jk)**2 & |
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| 71 | & + ak1s(ji) * zhi(ji,jk) + ak1s(ji) * ak2s(ji) + rtrn ) |
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| 72 | hipor(ji,jk) = zhi(ji,jk) * densSW(ji) |
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| 73 | END DO |
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| 74 | END DO |
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[3443] | 75 | |
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[10222] | 76 | IF( ln_timing ) CALL timing_stop('sed_co3') |
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[3443] | 77 | |
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| 78 | END SUBROUTINE sed_co3 |
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| 79 | |
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| 80 | END MODULE sedco3 |
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